1. The sales reported in this Form 4 were effected pursuant to Rule 10b5-1 trading plans adopted by TA Associates, L.P. on February 29, 2012 and March 1, 2012.

2. These securities were sold solely by TA IX L.P.

3. These securities were sold solely by TA Atlantic and Pacific V L.P.

4. These securities were sold solely by TA/Atlantic and Pacific IV L.P.

5. These securities are owned solely by TA IX L.P. TA Associates, L.P. is the Manager of TA Associates IX LLC, which is the General Partner of TA IX L.P. Each of TA Associates, L.P. and TA Associates IX LLC may be deemed to have a beneficial interest in shares held by TA IX L.P. and each disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest in such shares which is subject to indeterminable future events.

6. These securities are owned solely by TA Atlantic and Pacific V L.P. TA Associates, L.P. is the General Partner of TA Associates AP V L.P., which is the General Partner of TA Atlantic and Pacific V L.P. Each of TA Associates, L.P. and TA Associates AP V L.P. may be deemed to have a beneficial interest in shares held by TA Atlantic and Pacific V L.P. and each disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest in such shares which is subject to indeterminable future events.

7. These securities are owned solely by TA/Atlantic and Pacific IV L.P. TA Associates, L.P. is the General Partner of TA Associates AP IV L.P., which is the General Partner of TA/Atlantic and Pacific IV L.P. Each of TA Associates, L.P. and TA Associates AP IV L.P. may be deemed to have a beneficial interest in shares held by TA/Atlantic and Pacific IV L.P. and each disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest in such shares which is subject to indeterminable future events.

Remarks:

The Reporting Persons are members of a 13(d) group. The Reporting Persons have a representative on the Issuer's board of directors. C. Kevin Landry currently serves as the Reporting Person's representative on the board of directors and, as such, the Reporting Persons are deemed directors of the Issuer. Due to the limit of joint filers that can be included on one form, TA Associates, L.P., TA IX L.P., TA Associates IX LLC, TA Atlantic and Pacific V L.P., TA Associates AP V L.P., TA/Atlantic and Pacific IV L.P., TA Associates AP IV L.P., TA Strategic Partners Fund A L.P., TA Strategic Partners Fund B L.P., TA Associates SPF L.P., and TA Investors II L.P. have filed two separate forms simultaneously, which relate to the same securities of the Issuer held by such Reporting Persons.